App changes my iphone volume – Sleep Better: Sleep Cycle App Review

This is a pretty great app, and I love it. It does what it advertises very well, and I use it to monitor my sleep almost every night. HOWEVER I’ve noticed that the app has been TURNING OFF the volume on my iPhone! This is a huge problem because I have other apps I need sound on for, such as a backup alarm. Is there any way to stop this from happening?
Review by Willowitaly on Sleep Better: Sleep Cycle App.